Payment Flow through Redirect URL

This flowchart shows a basic payment flow process for a successful transaction. Here's the sequence of events:
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From your payment selection page, a shopper clicks the PayPal button to pay.
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This triggers an XML order request that is sent to WPG.
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The order request is then submitted from Worldpay to PayPal.
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PayPal creates an order that includes the success URL.
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Your system requests a redirect to PayPal (by Worldpay). We send a redirect URL to your system, then you use it to redirect the shopper to PayPal.
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The shopper is redirected to the PayPal login page.
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The shopper authenticates with their user name and password and completes the payment after verifying the amount, funding instrument, and shipping address (if any).
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PayPal then processes the payment, sends notification to Worldpay and redirects to the success URL
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Worldpay updates the transaction status and notifies you of the payment status. Worldpay intercepts and redirects the success page.
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The shopper lands on the success notification page.